diff options
Diffstat (limited to 'erts')
| -rw-r--r-- | erts/emulator/beam/erl_port_task.c | 66 |
1 files changed, 56 insertions, 10 deletions
diff --git a/erts/emulator/beam/erl_port_task.c b/erts/emulator/beam/erl_port_task.c index b661c26036..8ceadcdb8c 100644 --- a/erts/emulator/beam/erl_port_task.c +++ b/erts/emulator/beam/erl_port_task.c @@ -120,7 +120,9 @@ struct ErtsPortTaskBusyCallerTable_ { }; -static void begin_port_cleanup(Port *pp, ErtsPortTask **execq); +static void begin_port_cleanup(Port *pp, + ErtsPortTask **execq, + int *processing_busy_q_p); ERTS_SCHED_PREF_QUICK_ALLOC_IMPL(port_task, ErtsPortTask, @@ -1525,7 +1527,7 @@ erts_port_task_free_port(Port *pp) erts_resume_processes(suspended); if (!(flags & (ERTS_PTS_FLG_IN_RUNQ|ERTS_PTS_FLG_EXEC))) - begin_port_cleanup(pp, NULL); + begin_port_cleanup(pp, NULL, NULL); } /* @@ -1681,8 +1683,7 @@ erts_port_task_execute(ErtsRunQueue *runq, Port **curr_port_pp) begin_handle_tasks: if (state & ERTS_PORT_SFLG_FREE) { reds += ERTS_PORT_REDS_FREE; - - begin_port_cleanup(pp, &execq); + begin_port_cleanup(pp, &execq, &processing_busy_q); break; } @@ -1773,22 +1774,66 @@ release_port(void *vport) #endif static void -begin_port_cleanup(Port *pp, ErtsPortTask **execqp) +begin_port_cleanup(Port *pp, ErtsPortTask **execqp, int *processing_busy_q_p) { int i, max; - ErtsPortTask *qs[2]; + ErtsPortTaskBusyCallerTable *tabp; + ErtsPortTask *qs[3]; ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(pp)); /* - * Handle remaining tasks... + * Abort remaining tasks... + * + * We want to process queues in the following order in order + * to preserve signal ordering guarantees: + * 1. Local busy queue + * 2. Local queue + * 3. In queue */ max = 0; - if (execqp && *execqp) { - qs[max++] = *execqp; + if (!execqp) { + if (pp->sched.taskq.local.busy.first) + qs[max++] = pp->sched.taskq.local.busy.first; + if (pp->sched.taskq.local.first) + qs[max++] = pp->sched.taskq.local.first; + } + else { + if (*processing_busy_q_p) { + if (*execqp) + qs[max++] = *execqp; + if (pp->sched.taskq.local.first) + qs[max++] = pp->sched.taskq.local.first; + } + else { + if (pp->sched.taskq.local.busy.first) + qs[max++] = pp->sched.taskq.local.busy.first; + if (*execqp) + qs[max++] = *execqp; + } *execqp = NULL; + *processing_busy_q_p = 0; + } + pp->sched.taskq.local.busy.first = NULL; + pp->sched.taskq.local.busy.last = NULL; + pp->sched.taskq.local.first = NULL; + tabp = pp->sched.taskq.local.busy.table; + if (tabp) { + int bix; + for (bix = 0; bix < ERTS_PORT_TASK_BUSY_CALLER_TABLE_BUCKETS; bix++) { + ErtsPortTaskBusyCaller *bcp = tabp->bucket[bix]; + while (bcp) { + ErtsPortTaskBusyCaller *free_bcp = bcp; + bcp = bcp->next; + if (free_bcp != &tabp->pre_alloc_busy_caller) + erts_free(ERTS_ALC_T_BUSY_CALLER, free_bcp); + } + } + + busy_caller_table_free(tabp); + pp->sched.taskq.local.busy.table = NULL; } erts_port_task_sched_lock(&pp->sched); @@ -1875,7 +1920,8 @@ begin_port_cleanup(Port *pp, ErtsPortTask **execqp) } erts_smp_atomic32_read_band_nob(&pp->sched.flags, - ~ERTS_PTS_FLG_HAVE_TASKS); + ~(ERTS_PTS_FLG_HAVE_BUSY_TASKS + |ERTS_PTS_FLG_HAVE_TASKS)); /* * Schedule cleanup of port structure... |